As
seen elsewhere in this website, it was a very common practice to reuse
cover artwork on later books; and that was especially true when national
borders were crossed.

Collector Bill Taylor points out that
this was almost the case when the cover art for Ballantine 02751,
Expedition to Earth by Arthur C. Clarke, was reused on Pan
Science Fiction book 24099, Seed of Stars, by Don Morgan &
John Kippax.

The oddity here is that the number on
the side of the ship changed. The image was faithfully reproduced in every
other way.